Allow VNDK 'users' which are not foreground to connect to camera devices.

Bug: 125464062

Test: GCA (sanity)
Test: Connect to a camera device using a HAL process, change the device user and connect again;
      connection is successful

Change-Id: Ia25b961baa396fd383d089e400c6d877b9875955
Signed-off-by: Jayant Chowdhary <jchowdhary@google.com>